Automatic rifle.



M. W. BROWN.

AUTOMATIC RIFLE.

APPLICATION HLBD PEB. s, 1910.

Patented Aug. 9; 1910.'

SHEETS-SHEET 1.

M. W. BROWN. AUTOMATIC. RIFLE. APPLIoAfrIoN FILED Imm, 1910.

Patented Aug. 9,'1910.

(i SHEETS-SHEET 2.

3fm/vanto@ @vi/hmmm M. W. BROWN.

AUTOMATIG RIFLE. APPLICATION FILED Emma, 1916.

Patented Aug. 9,1910.

4 SHEETS-SHEET 3.

Wma/we@ M. W. BROWN.

AUTOMATIC RIFLE.

APPLICATION FILED 1BB.8. 1910.

Patented Aug. 9, 1910.

4 SHEETS-SHEET 4.

holt may he antolnsfttiicelli,y

AUTOMATXC RIFLE. f

Application filed .February 5.93.0.

nos and particularly to that type olf gun lrnown gas-operated, automatic, magazine lt 1s designed to construct. e, gno. tliet 'will be provided with ineens whereby o i l to the tiring, said breech lido a. so automotioalljyv releasing itself otter the cartridge has been tired.

This invention also oontenipletesjthe provision of e bolt- Whicli will have" substantiallf,7 the regulation holt action in combination With the above named inprovenients.`

A further object is the. combination in one gun of compact formation of o safetyflook for the firing pin, and oJ gee chamber for operating the breech bolt by ineens of the powder gases, all of which elements are sunplitied and improved. l

W ith the above and other objects in veiW, this invention consists of the construction, combination end arrangement of parte all as hereinafter more ulljvdescribed, claimed and illustrated in the accompanying-drawings, wherein:

- Figure l is a side elevation of c gun constructed inY accordance with the present invention, illustrating the location of the various elements of the mechanism; Fig.- 2

a central longitudinal section of. the gnnf parts thereof being in' eleifzition, illustrating the location of te gas chamber; the ejector and receiving'hainbers, the magazine end breech bolt; Fig. 3 is e detail longitudinal section taken through the chamber illustrating the breech holt. :it tlie extreme limit of its rearward stroke, setting forth the cooperation between the breech bolt and the magazine, also between the operated piston rod and breech bolt; Fig. Ll is et liorizontal sectionM thereof; Fig. 5 is :t centrel longitudinal section of the cylinder in Which reciprocetes the ges operated piston; illustreting the .connection thereof with the lierrel of the gun; 6 isa cross section taken along line 6 6 et' Fig. f5; l is a. similar vien- -taken along line--T of Fig. e; Fig,V 8 is :i perspective View of the breech bolt;

Specicaton of Letters Patent;-

letentetl Ang.. Si?, 1Min serial no. ermee. l

. Fig. l is a. transverse section of the firing pin locking mez/ins; Fig. l@ isv e freginentel perspective View of the ring pin; Fig. ll is c perspective of' the magazine; Fi@ Q13, le, 3.5, and l@ are perepectivc riens oi' the bend seeming they cylinder to the barrel of i, of operating in Seid 'olf the esci-ipe velve, olf the in the illoriverd. extremity ojl plug cro ien eind cylinder on which the escono valve. opcroire:7 and of the pino! the. ne

tion slide, respectively, It? i.'

nien longitudinal section of the stoclr of the gun.

iQ- hm '-5 f 1o .trefle-ncl. .lenig .nl o ile. ommns, lo indicates; the barrel oit the gon ovinetl with the stock il and 'the `fore erin .l/l, .seid fore erm containing the gas voperated mechanisms in such e manner that the size' of the former is not, materially increased in comperisonV to the sizes of the similar elements of en ordinary magazine riiio,

Carried in the forev arm and protruding from the forward extremity thereof is the cylinder 13., seid cylinder extending to Withm in :substantially six and erhalt inches ofthe breech` mechanism. sind magazine. and is se cured. to the borrel at the rearward extremity thereof by the bend il encircling" the seine. The bend lelis provided -with the upwardly extending lug 15a which is dove-tailed into the barrel of the gun, thus firmly and substantially securing the cylinder thereto.

A piston l5 reciprocates in the cylinder i3, and has the ennnlar groove i6 niid--Wa-y of its lengt-[li and the rearwardly projecting tlrefided log; lll This log 1"? engages o. threaded orifice itl in the forward extremity of the piston rod l@ and rigidly secures seid piston thereto. The rear extremity of the cylinder is closedL by the central oriced plug 20 through which reciprocates the pis tonl rod 19. llic rear terminal of the piston rod is engaged by the plunger 21, said piston rod being threaded therein. This plunger reciprocetes in the bore 2Q, oil" the forearm ceti/veen the extremity of the cylinder :ind the breech mechanism and is so constructed that the seme is provided with a recess 23 treme forward position of its Stroke.

)luneer 2l Le also orovided 'wit-li the de ree zu i is secured the forward terminal of the action slide/Q5.

which tits over the 'rear extremity of the. cylinder when the breechbolt isnt the e?? .e Tie* sion or recess 2e in one eide thereof in which l .secured te the barrel l@ band 26, seid bend passing eL-Lm; .he cymer amd the bere andas ee @Y ew pressed as et 2'? t@ prove ze-meene e "mf- Yin spaced rela-'en with respeex Je the hemel-L through the The cylinder ends Hush with the emfvre interior diameter .of 't QUE the Smm by ehe screw 36 being reeeved disk being of an smal'er iemeter "henfthe A may be conneer with the bare of ehe barre@ j enge 35 in such a mapner that the vave is normaly reained agams; the plug 287 @liesing the ports 33.; In order that. the eyime' 10, @series o ane parte 37 piene bhe ey index,` the depresse pereiom 7 ci'zle hemd 26 and; -the owe: side ef Ehe barrel 3.0.

Exam this nstucton i@ Wifi be seen the?, e me; sessies f @be ports 37,- the seme. cluses foy am instant A'the bore 0f the Qme between 'the parte nd the nozze theme@ zm durx'g `fns time mos@ the @if the bemin@ pe'wex' 'Wi "@fn'fwgh the p0 s and; inte the eynde 13, exe'mg; e

Uressure en be meto@ mcne the same L 'i 7 U reame/emily egans; 'elle @essere of t 11e spring 38 bearing bezween ehe plug; and i: e plsten', merma-Hy retaining 'he p infile oalww end 'ef eyinder. 1L ,es action of ,e 'ion md will 'force the 'Junger y VQ-diy n fee smeQ/f, of the' me aufm and esumove' he mation Side 25, which will in wm operaie *he breech boit. filwul 'the @essere of the geef-s be xbm/4 the immuni in "ehe cyedef le the sm'pus W1 pas# '-hfeugh @he pete une?. exert A2L pms@ e egenet zhe D: me tubum waive memnen: 522 sur, mmf@ the swf imm sommet with 'ehe plug egeins; the are @i the and pei# mit the free 4 of gases'l'hrwfh sef pam W mme he pressm'e within ne suee Jr @Memoire The breeeh bei' 39, saidlchambew being Scmet w the elfe mm l2 'at its'feward extremifzy and, the stock l1 et the eppese extremity thereef. The :m:f,'s:-'1ee1 meme 4;@ wherein the shel is retained pre provided' ,with en eongaed apenng 4l thrugh which he shels are ejected after fixing thereof, ee. opening being se heated ,that-fit :fegsters 'wih the slots in which the vhii'eeelm boit o i tes as hereinafter .more -fmy describedpeA The Tear extremity of the 'cheminer is open in orde? to provide im the full recpmeatim olifl ehe., belt, permitting Ai; ha owm' exnrenxity eff he chmuber and adjmem'. the exerge pmen' l0 is e cir-mmm* recess @r2 the immette? @freilich is ies-ger than the faber@ of the chamber, and y llnsequenyijy pmvides a mee/ns Whezjeby l#he t she Within the enaged potion 40 of* the bere ofthe re. 4

The chamber or receiver is provided im the Vertical sides thexeof ,Wthvzhe longitudinay extending guide-ways 43, seid guida Ways ex' smits coinciding with the of the vrecess; 42, and ,further rovide e means whereby khe betl is securey elwthin he chamber of 'eee've and the omgim 'dined movemem therem? be seem-ate. An

member m. eeever 39 in auch a manners that the emtrges @summed in the maga-zine may he teken the-efem amd placed Within :the chamber 4f() by the bolt apen #he ewmrfl Amovamend, theaecof, l 4

The breech beit isibrfeied .in @We pmtons fue main bedy portion #i5 and the owa. kicking memwer 46g The :inem noch gorion. is provided Witl a engtudine boe im which operates che firing pin 48. The im* Wmx i-el'miml ef the bore 4?'. is enmnged 151e rm/ide a housing for the sprin'v 48a whim ears against the colle? 2:9 forme integrally abou' the forwmc exsremity of he ng progect boit in which recpreeaes *she shank 5l me the locking portion 4216 .o the beh, This shank is provided Wh the s ira groove 52 Whieh is. normally engaged by the mein 'mdy pmgten and Whisk j with 'he sm'ece @baresi Thus. i?) seen 'that the 'foo-l; is famethe same te pees reew-ery ever nxe miggel" meme? that the frmg 'm 1s Wein-4 rawn eaghty 1n order thet sa. en force' ingest diameter,

pi and the shoulder o the enlarged perf farther enaxgea temigy of the main bndy perdon 5 of the the ein 53;

18 is threaded in sai chamber I er reeezver' and 1s p'evxdsd mth am elafge-` may be ecke, securely clamping the o" @ning fili is farmed in fsb@ under sde of position.

forming guides for the bolt.

ceases pass into the guide ways i3 of the receiver.

As a result, free movement of the bolt is permitted. Upon the forward movement of the bolt the lugs pass into the chamber 42 and are rotated by the spiral groove 52 and the pin 53, consequently locking the bolt against the chamber 4G and clamping the cartridge which is placed therein thereby firmly in The main body portion of the bolt is provided with the oppositely disposed projections 55 which operate in the slots 43,'

j In order to provide a means whereby the action slide 25 is secured to the main body portion of the bolt in order that the same may be recipro' cated, a downwardly projecting lug 56 is carried at the forward extremity ot said body portion 45, to which is attached in'any suitable manner the. action slide 25. The 4rotatable locking portion 46 provided with an inwardly extending' iange 571wliich su'rrounds a. central opening 58, through which operates the firing pin 48. One of the lugs 5i has pivotally mounted therein the `extractor 59, said extractor being retained in v contact with the bead oi the cartridge by the spring 60 operating against the rear extremity thereof. The forward extremity of the extractor is of latch formation and is adapted to normally operate in the recess 61 formed inthe forward extremity of the 4receiver and adjacent the chamber 40.

Upon the forward motion of the bolt it will readily be seen that the shell .is jammed tightly into the chamber 40 and the bead of which bears against the extractor. Thus it will be seen upon the rotation of the locking-portion of-the bolt throughits quadrant, the shell will be slightly loosened in the chamber due to the tendency of the locking portion toA move. rearwardly7 thereby facilitating the removal of the shell. The opposite lug 54 is provided with the longitudinal recess 62 which coincides, when the bolt is at the extreme portion of its stroke, with the ejector 53. This ejector operates normally in the recess 64 in the side of the receiver 39 and is pressed inwardly by the coil spring 65 bearing ,ctthe forward extremity or' the ejector and in the recess (S6. This ejector is adapted when extending into the bore of the receiver to bear against the extreme lett hand side of 'the base of the Shell, and consequently exert a pressure thereagainst and swing the forward eartremity of the shell through the opening el in one side ot the receiver, thus ejecting 'the same. Irllhe rear extremity of the ejector comprises a lug 67 adapted to rest flush with the base of the recess 64 and prevent the ejector from extending too far into the bore of the receiver'. The forward movement of the bolt returns the ejector to theurecess 6e in such a manner that the same rests flush with the surface of the guide-ways'"fi3, and in no wey interferes with the nxovcinent oit the bolt.

The under surface of the rear extremity Vof the bolt is, provided with an elongated rei oess.68 in which. reciprocates the down*- wardly extending projection 69 which is carried by the firing pin 48, said projection adapted to be engaged vby the trigger as hereinafter more. fully described, upon the forward .movement of the bolt and conseqnently retain the forward extremity of the firing pin a short distance from the cap of the cartridge. From this construction, upon pulling the trigger, the tiring pin will be released and will explode the cap, as a result, firing the bullet. l

In order that the ring `pin may be looked when the same is cocked and prevent the firing of the gun accidentally, a recess 69 is formed adjacent` the rear extremity thereof. When thefiring pin is cocked, this recess coincides with the semicircular opcm ing 70 in the main body portion of the bolt, and is adapted to be engaged by a locking member. This locking member comprises a leaf 72 which is carriedby and operates a,

circular pivoted member 72", one side of which is flattened. When the .leaf is to the right hand side of thelolt, the rounded side of the circular member 72 engages a recess 69, and consequently locks the ring pin from reciprocation. However, when the leaf is placed on the other side ofthe bolt the iat portion operates adjacent the recess 69 and permits free movement of said firing pin.

The magazine 73 'is a parallelogram and is provided with the' follower 74,""said follower being operated by thespring 7 5. The

upper entremlty of the magazine is provided with 'the `lips 75 adjacent one side thereof, said lips adapted to engage the shell of the cartridge. The li s 75 and the opening in the upper side o the magazine co'perate with the opening 44 of the receiver, the u permost cartridge lying in the path of t e bolt and adapted to be carried thereby to the chamber 40. The rear vertical side of the magazine is provided with the recess 76, said 'recess being adapted to be engaged by the notches formed on the forward extrein ity of the lever catch 77 operating in the trigger guard 78. The trigger 'Z9 is ot the usual construction, the catch 8O being held iso ing; the 'ha uw tha Same ffiess 42.

'argemen grooves ffox'med therein, fpzlfs camed by said body particu adaped to exiigage said gmeves, wings, fmmed on. Said. bolt adam-ed @op @rate in th@ grooves in 'the breech, and mmm whereby said bolt Emy be, mrtomacaly gas operated.

2. In ,gills opamted automaiac fiile navng grooves fomeik in the, breech thereof, smd grooves opening into a circular enmgw ment, an eject 'pvete in said breech in the base4 of @ne m sa grooves adapta@ to 0perai@ m@ :side of the base of the she, a mit adapv' $50 mcip'fccmtf ii said groovemmyng ltglila@ pfim auts lorimm exzmty, 52.15%. rmismzablepnrlon being provdf with 'wiz adngd 'zo engag@ Said grooves, im@ gs having a, channei sherain t; permit im @jmmr to 'prjecz im@ the with of the shell after 'the pass @if ih@ ,Jy' and ex Wing adaperl t0 loosen the Shell pie'vnus 0 the mevamemh@ imm In 'testimfsw/ *wb-.mimi Mb; my sgsmtu@ in presence of iw@ Witness@ ML'LTN TWG PRWN. /tnesses: y

ANNA ROMNSGN, WILMAM BLUKMAN. 

